One Pluto year equals 248 Earth years. At 1473 miles in diameter—about half the width of the United States—Pluto is the ...

Learn about the recently discovered trans-Neptunian object that may eventually join Pluto as a dwarf planet, found at the ...

(Correction: An earlier version of this story misstated how far Pluto is from the sun. The correct number is 3.7 billion miles.) What was discovered in Flagstaff, Arizona, and killed off in Prague?

Pluto crossed Neptune's orbit to become the farthest planet from the sun (until it was demoted to the status of dwarf planet). When Pluto is closer to the sun, its surface ices thaw and ...

No no no, not that Pluto, this Pluto the planet, or should I say, the dwarf planet on august 24th 2006. The ninth planet from the sun was *** officially demoted to *** dwarf planet by *** group of ...

Upon the discovery of its existence in 1930, Pluto enjoyed decades of special status as one of the solar ... Still, Ceres remains a dwarf planet. Perhaps as it should, given Pluto's relegation ...

Astronomers have announced the discovery of a new dwarf planet in our solar system, named 2017 OF201. Located far beyond ...

Pluto, humanity's favorite dwarf planet, is getting some high-profile allies. "Star Trek" actor William Shatner wants to use ...

This sparked debate about Pluto's status in the planetary canon ... Regardless of whether Pluto is a planet or a dwarf planet, it remains a fascinating part of the solar system, from its huge ...

In a controversial vote, astronomers — not planetary scientists — “demoted” Pluto to the status of being classified as a dwarf planet, taking away one major planet and reducing the number ...

In 2006, the International Astronomical Union reclassified Pluto as a dwarf planet because it doesn't meet all the criteria for full planet status. Pluto was discovered 95 years ago on Feb. 18 ...